German Adjective Endings — The Complete Guide

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If German cases felt like a wall, adjective endings feel like the wall has wallpaper. You have learned that der Mann becomes den Mann in the accusative — and now you discover that der alte Mann becomes den alten Mann, and ein alter Mann becomes einen alten Mann, and with no article it is alter Mann in the nominative altogether.

The good news is that adjective endings follow a logical system. There are three tables, each with a clear rule for when to use it, and the endings themselves follow patterns you can learn step by step. This guide walks you through the complete system — clearly, with full tables and real examples — so you can stop guessing and start getting it right.

Why do German adjectives change endings?

In German, adjectives that come before a noun must reflect the gender, case, and number of that noun. This is called adjective declension.

The reason goes back to the German case system: every noun has a gender (masculine, feminine, neuter) and a case (nominative, accusative, dative, genitive). The article — der, die, das, ein — normally carries this information. But when an adjective sits between the article and the noun, the system still needs the gender and case signal to appear clearly somewhere.

That creates the three declension types:

1. Weak declension — after definite articles (der, die, das, die plural): the article carries the full signal, so the adjective uses mostly simple endings.
2. Mixed declension — after indefinite articles (ein, eine, kein) and possessives: the article sometimes carries the signal and sometimes does not, so the adjective fills in where needed.
3. Strong declension — no article at all: the adjective carries the full signal itself.

One key principle runs through all three:

Somewhere near the noun, the gender and case signal must appear — once, and only once.

Keep this in mind and the whole system becomes much more logical. If you are still shaky on cases, read the German cases guide first — adjective endings depend on the case of the noun.

The three declension types

1. Weak declension — after definite articles

Use weak declension after: der, die, das, die (plural) and also dieser (this), jeder (every), welcher (which), alle (all).

The definite article already carries the full gender and case signal — so the adjective just needs a simple ending. The pattern is almost entirely -e and -en.

The pattern to memorise:

• Nominative singular (all genders) and accusative feminine/neuter: -e
• Everything else: -en

That is it. Weak declension is the simplest of the three — just two endings to deal with in practice.

Examples:

• Der alte Mann liest. — The old man reads.
• Ich sehe die junge Frau. — I see the young woman.
• Er hilft dem kleinen Kind. — He helps the small child.
• Das ist das Haus des reichen Mannes. — That is the rich man's house.

2. Mixed declension — after indefinite articles

Use mixed declension after: ein, eine, kein, keine and all possessive pronouns (mein, dein, sein, ihr, unser, euer, Ihr).

The indefinite article has a gap: in the nominative masculine and nominative/accusative neuter, ein carries no gender signal (compare ein with der — you cannot tell it is masculine from ein alone). In those positions, the adjective must step in and carry the signal — using the strong ending. Everywhere else, the article does the job and the adjective uses the weak ending.

Note: ein has no plural form. The plural column uses kein as the model — the same endings apply to other plural indefinite-type forms where relevant.

The three “strong” endings in mixed declension — the ones to watch:

• Nominative masculine: -er — ein alter Mann
• Nominative neuter: -es — ein altes Kind
• Accusative neuter: -es — ein altes Kind

Everything else follows the weak pattern: -e or -en.

Examples:

• Ein alter Mann liest. — An old man reads.
• Ich habe einen neuen Computer. — I have a new computer.
• Sie wohnt in einer kleinen Wohnung. — She lives in a small flat.
• Das ist mein bester Freund. — That is my best friend.

3. Strong declension — no article

Use strong declension when there is no article before the adjective — the adjective must carry the full gender and case signal on its own.

This happens often with: uncountable nouns (kalter Kaffee), plural nouns without an article (alte Bücher), and after numbers (drei kleine Kinder).

The strong endings mirror the definite article endings — because the adjective is doing the article's job.

Tip: Compare these endings to the definite article endings from the cases guide. They are nearly identical in logic — because the adjective is standing in for the article.

Examples:

• Kalter Kaffee schmeckt gut. — Cold coffee tastes good.
• Frisches Brot ist das Beste. — Fresh bread is the best.
• Er trinkt guten Wein. — He drinks good wine.
• Mit frischer Luft schläft man besser. — With fresh air you sleep better.

The complete system at a glance

Multiple adjectives before a noun

When two or more adjectives appear before the same noun, all of them take the same ending — determined by whatever article (or lack of article) comes first.

• Der alte, müde Mann schläft. — The old, tired man sleeps.
• Ein junger, freundlicher Lehrer. — A young, friendly teacher.
• Frisches, kaltes Wasser. — Fresh, cold water.

You do not need a different ending for each adjective. They all follow the same rule based on the article or absence of it.

Adjective endings after indefinite pronouns

A few common words trigger patterns worth knowing:

After viel, wenig, mehr — often no article; the following adjective tends toward strong endings:

• viel frisches Gemüse
• wenig freie Zeit

After alle — treated like a definite-type context; following adjective uses weak endings:

• alle alten Bücher

After einige, mehrere, viele — these behave like words with no clear gender signal on their own; the adjective often uses strong endings:

• einige alte Bücher
• viele junge Leute

How to learn adjective endings effectively

Step 1: Start with weak declension
Weak declension covers every sentence that uses der, die, das — the majority of German. Master -e and -en first. Drill until it feels automatic.

Step 2: Add mixed declension
Focus on the three strong gap forms: nominative masculine (-er), nominative neuter (-es), accusative neuter (-es). Everything else in mixed is already familiar from weak.

Step 3: Add strong declension last
Strong is less common in casual speech but important for reading and writing. By then, endings will already echo what you know from articles.

Step 4: Practise in sentences, not just tables
Tables are for reference. Write a few sentences a day with an adjective before a noun — vary gender, case, and article type. Use the grammar and exercises sections on Studygerman.io for structured practice.

Step 5: Connect to cases and vocabulary
Adjective endings only make sense if you know the case of the noun. Build vocabulary by level alongside — many lists include adjectives you can plug into your own sentences.

A 7-day plan to master adjective endings

Common mistakes to avoid

Mistake 1: Using the same ending for every adjective
Defaulting to -en everywhere is tempting, but it is wrong in several singular slots — especially nominative and accusative feminine/neuter in weak declension.

Mistake 2: Forgetting the three strong gaps in mixed declension
After ein, the adjective must carry gender in nominative masculine (ein alter Mann, not ein alte Mann) and nominative/accusative neuter (ein altes Kind, not ein alte Kind).

Mistake 3: Applying weak endings after no article
Without an article, the adjective does the article's job: alter Mann, not alte Mann (masculine nominative singular).

Mistake 4: Not connecting endings to cases
If the case is wrong, the ending will be wrong. Strengthen cases first.

Mistake 5: Memorising all three tables at once
Sequential learning is faster: weak → mixed → strong.

Final thoughts

German adjective endings are systematic — once you see the “signal appears once” principle, the three tables stop feeling random. The definite article does the heavy lifting in weak declension; the adjective fills gaps in mixed; and the adjective takes full responsibility in strong declension. Start with weak, add mixed, finish with strong — and practise in real sentences every day.

Combined with solid cases, verb conjugation, and vocabulary by level, adjective endings complete a large part of the core grammar you need to move confidently toward B2 and beyond.

Disclaimer: This article is for general information only. German grammar has exceptions and regional variation. Always consult multiple resources and official course materials when learning German.